Ag:TiN-Coated Polyurethane for Dry Biopotential Electrodes: From Polymer Plasma Interface Activation to the First EEG Measurements
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- 作者：Paulo Pedrosa ; Patrique Fiedler ; Clá ; udia Lopes ; Eduardo Alves ; Nuno P. Barradas ; Jens Haueisen ; Ana V. Machado ; Carlos Fonseca and Filipe Vaz
- 关键词：Ag-doping ; dry electrodes ; EEG ; interfacial adhesion ; plasma activation
- 刊名：Plasma Processes and Polymers
- 出版年：2016
- 出版时间：March 2016
- 年：2016
- 卷：13
- 期：3
- 页码：341-354
- 全文大小：2239K
- ISSN：1612-8869
文摘
Several plasma treatments using argon, oxygen, and nitrogen are studied in order to increase the interfacial adhesion of the polyurethane/Ag:TiN system to be used as biopotential electrodes. The optimized plasma treatments conditions (100 W, 15 min, regardless of the gas) promote a steep decrease of the water contact angle values. The observed chemical and topographic alterations translate into excellent polyurethane/Ag:TiN interfacial adhesion of the plasma treated samples. The in-service validation of the proposed Ag:TiN-coated PU multipin electrodes is performed by acquiring EEG signals in parallel with the standard wet Ag/AgCl electrodes. No considerable differences are found in terms of shape, amplitude, and spectral characteristics of the signals when comparing reference wet and dry electrodes.